Literature offers many opportunities to integrate math into the content areas. It serves as as a common thread for students. Some mathematical topics are more obvious in some of the literature while other books the mathematics is more subtle. One can always ask, "Where's the math?"
Math and Reading
Good readers visulaize while they are reading .
Sadie and the Snowman Sketch to stretch strategy (K-2)
If You Hopped Like a Frog and Actual Size (3-5)
Writing and Math
http://www.readwritethink.org/lessons/lesson_view.asp?id=820 Use of Journals in math class
http://readwritethink.org/lessons/lesson_view.asp?id=144 Using literature to write stories